LittleMsSam's Calendar Tweaks Mod

This may be a silly question but did you delete the localthumbcache file in The Sims 4 folder? Anytime you add or remove a mod/CC, you need to do that.

If you did that, make sure it's up-to-date with the latest patch, and that you have script mods enabled. They get disabled after every patch.

I haven't had any issues with that mod.

Thanks @SweetieWright_84! It's not a silly question at all, because I haven't deleted the localthumbcache file. :D I didn't realise that that had to be done every time you add or take stuff out of the mods folder. It may solve issues with another mod I've had problems with too. I will try this when I next play. Thanks!

It's easy to forget to do that. I don't know if you really need to do it but I've always read on these forums that you do. So I just make it a rule for myself to do it every time I remove/add anything.

I hope it helps.